Well, there's your problem—the cloning mod is clearly cloning not just topics, but karma, too.Who knows what else it might be cloning…

As aeTIos says, probably walruses. They are multiplying

Also at some point we really need to re-install all mods from scratch. That would require all server staff to be online, though, and hours of downtime, because doing so would require re-installing SMF from scratch. But it would make it easier to install new mods.